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RETRACTED ARTICLE: Ameliorating effect of melatonin against nicotine induced lung and heart toxicity in rats

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This article was retracted on 30 January 2024

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Abstract

The present study was carried out to investigate the ameliorative effects of melatonin against nicotine-induced heart and lung toxicity. For this purpose, 75 mature male Sprague Dawley (SD) rats weighing 150–170 g were randomly divided into five groups (15 rats each): control group (rats were I/P injected with 1% ethanol in saline), nicotine group (rats were I/P injected with 0.6 mg/kg body weight), and combined nicotine and melatonin groups (rats received nicotine as in the previous group and melatonin at a dose of 1, 5, or 10 mg/kg body weight, respectively); all treatments were continued for 21 days. Fasting blood samples were collected from each rat at the 11th day and one day after the end of the last injection (22nd day) for complete blood count (CBC) determination, while sera were collected for the determination of lipid profiles. Malondialdehyde (MDA) concentration, superoxide dismutase (SOD) activity, and reduced glutathione (GSH) as well as DNA fragmentation percentage were assessed in cardiac tissue. Heart and lung samples were collected for estimation of caspase-3 expression and histopathological examination. The results revealed that nicotine increased the number of RBCs, Hb concentration, total cholesterol, and low density lipoprotein (LDL) and decreased high density lipoprotein (HDL). In addition, it decreased SOD activity and GSH concentration with increased MDA concentration, and DNA fragmentation in the heart, as well as caspase-3 expression in both heart and lungs. It also induced histopathological changes in the heart and lung tissues. Melatonin could ameliorate the deleterious effect of nicotine on the previous parameters either partially or completely, where melatonin restored complete blood count, improved lipid profile, mended lipid peroxidation and antioxidant parameters in the cardiac tissue, rectified caspase-3 expression in the heart and lungs, ameliorated DNA fragmentation percentage in the heart, and protected both heart and lung tissue against the harmful effect of nicotine. It is concluded that melatonin has a protective effect on the heart and lungs against the harmful effect of nicotine.

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The data used during the current study are available from the corresponding author on reasonable request.

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Contributions

Aya Khalil Hendawy: the corresponding author, writing the original draft, application of statistical analysis of data; Nahed El Sayed El-Toukhey: oversight and leadership responsibility for the research activity planning and execution “Supervision”; Sahar Samir Abd El-Rahman: histopathological examination; Hodallah Hatem Ahmed: ideas; formulation or evolution of overarching research goals and aims “Conceptualization,” development or design of methodology “Methodology,” oversight and leadership responsibility for the research activity planning and execution “Supervision,” and revision paper before submission for publication.

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Correspondence to Aya Khalil Hendawy.

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Ethics approval and consent to participate are already stated in “Materials and methods” as the following: The experimental protocol and procedures were approved by the Institutional Animal Care and Use Committee of the Faculty of Veterinary Medicine Cairo University (VET. CU. IACUC, (Egypt) with approval number (Vet CU/23012020104).

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The authors declare no competing interests.

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Responsible Editor: Mohamed M. Abdel-Daim

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This article has been retracted. Please see the retraction notice for more detail:https://doi.org/10.1007/s11356-024-32104-8

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Hendawy, A.K., El-Toukhey, N.E.S., AbdEl-Rahman, S.S. et al. RETRACTED ARTICLE: Ameliorating effect of melatonin against nicotine induced lung and heart toxicity in rats. Environ Sci Pollut Res 28, 35628–35641 (2021). https://doi.org/10.1007/s11356-021-12949-z

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  • DOI: https://doi.org/10.1007/s11356-021-12949-z

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